Table 3.

Pre- and post-operative semen parameters in the oligoasthenospermia group

Characteristic (n=34)	Preoperation	Postoperation	P
Sperm concentration (×106 ml−1)	21.75 (10.96, 38.25)	51.75 (17.56, 70.38)	0.0003
PR sperm number (×106)	9.150 (1.95, 15.52)	25.33 (3.64, 82.08)	0.0001
Total sperm number (×106)	49.65 (20.18, 89.57)	127.0 (42.41, 202.2)	0.0002
PR sperm ratio (%)	16.58 (3.63, 24.25)	34.88 (4.38, 45.56)	0.0003

Data are presented as median (P25, P75). P values were calculated with nonparametric tests. OAS: oligoasthenospermia; PR sperm: progressive sperm